Hydromechanical transmission
US6533695B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2001 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Oct 29, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2037/088
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydromechanical transmission includes a hydrostatic transmission with coaxially arranged fixed and variable displacement hydrostatic units connected to a planetary gear set. The input shaft of the variable unit extends coaxially through the hollow shaft member of the fixed unit to drive the ring gear of the planetary gear set. The hollow shaft member drives the sun gear of the planetary gear set. An input clutch can be provided to allow the hydromechanical transmission to achieve zero output speed. A charge pump driven by the input shaft of the variable unit can be utilized to insure that the hydraulic units are primed whenever the input shaft turns. The input torque can be applied from either end of the variable unit. A power takeoff shaft option is available from the end of the transmission opposite the input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.